Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type
4 @7 a4 r" f. e) s/ tNOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
: d+ r5 f2 w7 |/ @+ Author Affiliations# O# O0 l3 T, Y) h
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1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan 0 z- o- Q2 P" {
2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
; h+ N9 c" Y5 Z0 J, M3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan . P0 H4 z* c1 X) ]; _
4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
) j% d5 f: [4 L6 o- V5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan 2 L) B$ v# u$ B- m
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan
6 Z8 h" ^% a! h, K) d7Kinki University School of Medicine, Osaka 589-8511, Japan # L6 y4 g8 L1 l2 C! H+ ^, O4 {
8Izumi Municipal Hospital, Osaka 594-0071, Japan ! m. B3 u5 Q) r
9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan 5 U7 `7 K$ @; I2 V# z( E$ a
Correspondence to: Nobuyuki Yamamoto, Division of Thoracic Oncology, Shizuoka Cancer Center, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777, Japan. Tel: +81 559895222, Fax: +81 559895783, e-mail: n.yamamoto@scchr.jp
" e7 U- c: J+ y1 I6 W. E' }AbstractBackground: The antimetabolic agent S-1 inhibits thymidylate synthase similar to pemetrexed, but through a different mechanism of action. Whether the antitumour activity of S-1 depends on histological type remains unclear. We analysed pooled data from 2 phase II clinical studies of cisplatin and S-1 in patients with previously untreated advanced non-small cell lung cancer. Patients and Methods: We comprised 110 patients with stage IIIB or IV non–small cell lung cancer. Univariate and multivariate analyses were performed to determine the effects of histological type on progression-free survival and response rates. Results: On pooled analysis of the data, according to histological type, median progression-free survival was 3.8 months in patients with squamous cell carcinoma and 4.4 months in those with non-squamous cell carcinoma. Both analyses showed that progression-free survival and response rate did not differ significantly. Conclusion: Unlike molecular targeted agents and pemetrexed, a combination of cisplatin and S-1 may be no difference in response according to histological type.
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